工廠變配電所及其一次系統(tǒng)課件(ppt 52頁(yè))(文件)
【正文】 極數(shù) 分：?jiǎn)螛O、二極、三極、四極 ? 按 安裝方式 分： 固定式（ fixed）、插入式（ plugin）、抽屜式（ withdrawable） 分類 低壓斷路器 ? 短路分?jǐn)啵ɑ蚪油ǎ┠芰? shortcircuit breaking/making capacity 在規(guī)定的條件下包括短路條件在內(nèi)的分?jǐn)啵ɑ蚪油ǎ┠芰?。該值由制造廠規(guī)定。在規(guī)定的條件下，它用預(yù)期分?jǐn)嚯娏髦担▽?duì)交流，交流分量有效值）表示。 ? 額定運(yùn)行短路分?jǐn)嗄芰?Ics 在規(guī)定的條件下，斷路器應(yīng)能分?jǐn)嗟倪\(yùn)行短路分?jǐn)嗄芰χ怠?module for withdrawable units 5. Main connection elements: front, flanged, horizontal or vertical connection 6. Withdrawable unit 7. Control circuit plug 8. Auxiliary contact 9. Motor operator 10. Operating cycle counter 11. Electronic releases (control units) 12. Parameterization device 13. Earthfault protection module 14. 4line LCD display 15. Door sealing frame 16. Rated current module (rating plug) 17. EmergencyStop mushroom pushbutton 18. Closing release, voltage release 構(gòu)成 框架斷路器 ACB 低壓斷路器 1. NZM circuitbreakers, PN and N switchdisconnectors 2. Terminal cover 3. Control circuit terminal 4. Tunnel terminal for Al cables 4. Box terminal 5. Clip plate 6. Rear connection 7. Plugin and withdrawable unit 8. Standard auxiliary contact 8. Tripindicating auxiliary contact 9. Rotary drive with shaft support 10. Sidemounted lever 11. Extension shaft 12. Doorcoupling rotary handle 13. Rotary handle with rotary drive 14. Remote operator 15. Insulating surround 16. Designation label 17. Lockable toggleswitch 18. Communication module (DMI) 19. EASYLINKDS data plug 20. PROFIBUS interface 21. Voltage release or earlymake auxiliary contact 22. Delay unit for voltage release 23. Spacers 構(gòu)成 MCCB 低壓電器 低壓接觸器 LowVoltage Contactors 接觸器 概述 接觸器 ? 接觸器是用來(lái)頻繁控制接通或斷開(kāi)主回路的一種控制電器。 AC1 無(wú)感或低感負(fù)荷、電阻爐 AC2 繞線轉(zhuǎn)子異步電動(dòng)機(jī)的起動(dòng)、停止 AC3 鼠籠型異步電動(dòng)機(jī)的起動(dòng)、停止 AC4 鼠籠型異步電動(dòng)機(jī)的起動(dòng)、反接制動(dòng)、可逆控制、點(diǎn)動(dòng) 此外，還有 AC AC AC AC8 概述 The Contactor Utilization categories for contactors Type of current Utilization category Typical examples of application AC AC1 Noninductive or slightly inductive loads, resistance furnaces AC2 Woundrotor motors: starting, switchoff AC3 Squirrelcage motors: stating, switchoff, switchoff during running AC4 Squirrelcage motors: starting, plugging, reversing, inching DC DC1 Noninductive or slightly inductive loads, resistance furnaces DC3 Shunt motors: starting, plugging, reversing, inching, dynamic braking DC5 Series motors: starting, plugging, reversing, inching, dynamic braking 接觸器 構(gòu)成 （電磁式）接觸器由電磁系統(tǒng)、觸頭系統(tǒng)、滅弧裝置、復(fù)位彈簧等幾部分組成： 1. 電磁系統(tǒng) ：可動(dòng)鐵心（銜鐵）、
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